Broccoli and Celery Duo

Nutritional science has developed in leaps and bounds, from looking at nutrients in isolation to an increasing focus on bioavailability, bioaccessibility and bioefficacy. Most ingredients are influenced by synergy: how they are paired can shape digestibility and even improve nutritional value.  The food matrix.

This recipe applies the duo building-block principle:  pairing two vegetables to create a structured, mineral-rich base with a balanced fibre profile.

Why it works:

Broccoli and celery work well together because each contributes something distinct.

Broccoli brings:

  • Insoluble fibre plus some fermentable fractions
  • Glucosinolates (precursors to isothiocyanates such as sulforaphane)
  • Vitamin C (water-soluble), vitamin K and folate
  • Lutein and other carotenoids

Celery brings:

  • Structural insoluble fibre with high water content
  • Potassium and small amounts of vitamin K
  • Apigenin, a flavonoid with antioxidant activity, and other polyphenols
  • A neutral, low-sugar base

Together they create a low-carb, low-sugar, mineral-rich green purée that supports gut motility, microbial diversity and antioxidant input without becoming dense or overly fermentable. Lighter than a root duo, this mix focuses more on functional fibre and produces a fresh, digestible base that can sit easily alongside grains or protein.

Twice- or thrice-cooked broth

What adds to this recipe is the fact that the vegetables are simmered slowly in a very concentrated stock, allowing them to “imbibe” the flavour and minerals. After cooking this duo, the broth will finally be used to create either a porridge or pudding with bran flakes, oats, or amaranth. Not a drop goes to waste – and all of the flavour and goodness will be used. The transition from the high-mineral broth to the final “pudding” or “porridge” phase is an easy and efficient way of handling nutrients.

           

2:1 ratio

In this duo recipe, the weight ratio of broccoli to celery is 2:1. Using broccoli as the lead ingredient increases vitamin C, vitamin K and glucosinolate contribution; celery moderates texture and keeps the fibre profile open and structured rather than compact.

Ingredients

600 g broccoli (include stalks)
300 g celery
1 litre twice-used stock

 

       

       

Broccoli sprouts (optional)

Chop the celery and broccoli stalks evenly and place them in the slow cooker broth first. Including the stalks increases fibre diversity and mineral contribution but they need more cooking than the florets. Cook for two hours before adding broccoli florets. Cook in the slow cooker (my setting is automatic) for a further 5 hours. Remove from the broth, allow to cool, then blitz into a smooth purée.

Note: Long heat exposure (5 hours) is damaging for glucosinolates and Vitamin C. While the minerals stay in the broth, the bioactive sulforaphane relies on myrosinase, which is rapidly inactivated by heat. Adding a small amount of broccoli sprouts to the puree at the time of feeding will reintroduce active myrosinase, allowing sulforaphane to form. The effect will be significantly reduced if the puree is later cooked or frozen.

Pairs well with

This duo works best with ingredients that complement its fibre structure, mineral profile and phytochemical contribution without overloading similar plant compounds.

Lean proteins

Chicken thigh or turkey

  • White fish (pollock, cod)
  • Lean beef in moderation
  • Eggs

These add amino acids without increasing fermentable fibre or carbohydrate load.

Steady-release carbohydrates

  • Brown basmati
  • Buckwheat
  • Amaranth
  • Quinoa

These provide structural carbohydrate without overwhelming the light fibre profile of the Duo.

Neutral vegetable bases

  • Celeriac
  • Courgette
  • Mushrooms (beta-glucans support immune modulation)
  • Light leafy greens

These extend volume without shifting the balance too far towards sweetness or heavy fermentation.

Healthy fats

  • Salmon oil
  • A small amount of olive oil

Fat improves absorption of vitamin K and carotenoids present in broccoli.

Avoid combining with

Avoid stacking ingredients that concentrate similar fibre fractions or bioactive compounds to the point where the matrix becomes overly dense or excessively fermentable.

Other brassicas

  • Sprouts
  • Cauliflower

These increase glucosinolate load if used habitually in high amounts.

High starch loads

These can dominate the structure of the bolus and reduce the proportional contribution of fibre and phytonutrients.

This mixture freezes well.

And it’s popular:

*****

 

In the bowl

In this bowl, the broccoli and celery Duo is paired with basmati rice, chicken liver mousse, simmered chicken meat and cartilage, green beans, and flax seeds. The Duo provides beneficial brassica compounds like sulforaphane alongside prebiotic fibre. Basmati rice serves as a highly digestible carbohydrate source to meet energy requirements efficiently.

Chicken meat and cartilage harvested from a broth recipe provide high-quality protein and a concentrated source of bioavailable collagen and glycosaminoglycans (see note below). The liver mousse significantly boosts the bowl’s micronutrient profile, specifically Vitamin A and B vitamins. Green beans offer structural fiber, while flax seeds contribute alpha-linolenic acid (ALA). Together, these building blocks create a nutrient-dense meal where the animal-sourced fats enhance the bioavailability of the fat-soluble phytonutrients in the vegetable Duo.

Nutritional Note: The Bioavailability of Simmered Cartilage

Cartilage in its raw, structural state can be difficult for a dog’s digestive enzymes to fully break down. However, the stock-making process transforms tough collagen into gelatin, a highly bioavailable form of protein.

From a building-block perspective, this simmered cartilage becomes a concentrated source of glycosaminoglycans (GAGs), such as chondroitin and glucosamine, which are essential for maintaining joint health and supporting the gut lining.

Important Considerations:

  • Always consult your veterinarian before making any significant dietary changes, particularly where there are pre-existing health conditions or dietary restrictions.
  • If you are feeding commercial food, check the label for ingredients before giving more. Excessive intake of any foods can have adverse effects.
  • Ensure (where possible) that you use high-quality, organic products specifically formulated for pets (or better still, human grade ingredients) to avoid any potential adverse effects.
  • Introduce new foods gradually to avoid adverse effects such as gastrointestinal upset or diarrhoea.
  • I provide nutritional information purely as a helpful guide. Nutritional information on ingredients is obtained from the US Department of Agriculture’s FoodData Central site (https://fdc.nal.usda.gov/index.html) and any nutritional information provided in recipes is based on an online calculator: calories and other information will vary based on brands, ingredients and other factors.
  • Check nutrient levels and recommendations for your dog’s weight, age and activity. For example this nutritional guideline produced by FEDIAF.
  • I am not a professional canine nutritionist but supporting research is cited.
  • The recipes shared were created by me and tested in my kitchen – and tasted and approved by our doggy friends!