Eating well on a busy schedule usually comes down to having a simple, repeatable structure rather than a complicated meal plan.
Batch one protein, one grain, one vegetable
Cooking a large batch of a protein, a grain, and a roasted vegetable at the start of the week gives you the building blocks for several different meals.
Keep a stocked pantry
A few staples — canned beans, olive oil, good spices — make it much easier to turn leftovers into a proper meal.