What are the three main groups in a one dish meal?

There's no strict rule for categorizing a one-dish meal, but generally speaking, the three main groups you'd find in a successful one-dish meal are:

1. Protein: This provides the bulk of the meal and can be meat, poultry, fish, beans, lentils, tofu, or eggs.

2. Carbohydrates: These provide energy and can be grains (rice, pasta, quinoa, couscous), potatoes, or vegetables.

3. Vegetables: These add flavor, texture, and nutrients.

Example:

* One-pan Chicken and Vegetables with Rice: Chicken (protein), rice (carbs), and broccoli, carrots, and onions (vegetables).

It's important to note that some one-dish meals might combine two groups (like a pasta dish with lots of vegetables) or even focus on one group (like a hearty lentil stew). The key is to create a satisfying meal that provides a balance of nutrients and flavor.