I'm speaking as a mom here but one of my kids has Crohn's. One thing I made up for my teen/young adults who were busy was pasta salad. You can make a huge batch on the weekend for several lunches. Bake some Italian sausages or chicken breast in the oven. At the same time boil up some rotini or whatever. Throw in some cut broccoli for the last few minutes of the pasta boiling. Grate some cheese. Mix it in a big bowl with olive oil or salad dressing. Add some extra veggies you like. Cube or slice the meat. One bowl meal!