How many servings does this recipe make?

This recipe makes 4 servings. You can adjust the portion size directly on this page.

What ingredients do I need for Mustard-Sauced Vegetables Au Gratin?

You need 15 ingredients. The key ingredients include: 2 c. broccoli flowerettes, 2 c. cauliflower flowerettes, 2 c. sliced carrots, 1 red pepper, and more.

Is Mustard-Sauced Vegetables Au Gratin suitable as general?

Yes, Mustard-Sauced Vegetables Au Gratin falls under the General category and is a great choice for this type of meal.

How do I store leftover Mustard-Sauced Vegetables Au Gratin?

Store leftovers in an airtight container in the refrigerator for up to 3–4 days. Reheat gently before serving.

Mustard-Sauced Vegetables Au Gratin Recipe

Name: Mustard-Sauced Vegetables Au Gratin
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 2 c. broccoli flowerettes; 2 c. cauliflower flowerettes; 2 c. sliced carrots; 1 red pepper; 1 c. celery, thinly sliced; 1 c. chopped onion; 3 T. butter; 1/4 c. flour; 4 t. Dijon or yellow mustard; 1 t. basil; 1 1/2 t. instant chicken bouillon granules; 1 2/3 c. milk; 1/2 c. soft bread crumbs; 2 T. grated Parmesan cheese; 1 T. butter, melted

Try this homemade Mustard-Sauced Vegetables Au Gratin recipe the whole family will love. Made with broccoli flowerettes, cauliflower flowerettes, carrot…

This Mustard-Sauced Vegetables Au Gratin relies on simple, everyday ingredients such as broccoli flowerettes, cauliflower flowerettes, sliced carrots and red pepper. It comes together quickly and makes 4 servings, at about 1343 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.

It's versatile enough for an easy weeknight dinner yet satisfying enough for guests at the weekend. Serve it with your favorite sides, and keep any leftovers for a quick meal the next day.

Updated Jun 30, 2026

Serves 4 General

1343

kcal

Calories

Tips for the best results

Read through all the steps once before you start and measure out your ingredients first — it makes everything go more smoothly.
Taste as you go and adjust the seasoning before serving.
Avoid overcrowding the pan — cook in batches if needed for the best texture.
Let the dish rest for a few minutes before serving so the flavors settle.
Store leftovers in an airtight container in the fridge and enjoy within a few days.

Variations & substitutions

Use a neutral oil or a plant-based spread in place of butter for a dairy-free version.
A good 1:1 gluten-free flour blend works well if you need a gluten-free version.

No specific allergen information. Please check the ingredient list for possible allergens.

My Personal Notes

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Mustard-Sauced Vegetables Au Gratin

Tips for the best results

Variations & substitutions

My Personal Notes

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