This is our comfort food and it's pretty basic:
Protein of choice (we usually use gr bison, but gr beef, gr chicken, gr turkey, gr turkey sausage have all worked for us).
Sauce protein with olive oil, chopped onion, chopped/minced garlic. Clear a spot in the middle of the pan, put in tomato paste, when tomato paste deepens to a maroon, stir everything together. Add diced or petite-diced tomatoes. Add tomato sauce or crushed tomatos or jarred sauce (we usually use Classico tomato and basil because it has the lowest added sugar). If using dried herbs (basil, oregano), add here. Cook 15-20 minutes to meld flavors. Add fresh grated parmesan, romano, or asiago cheese. If adding fresh herbs, add them here (basil, oregano). Optional, add some small broccoli florets to the sauce 2-4 minutes before finishing.
We make variations of this regularly as it's a household favorite plain spaghetti sauce. I always have the makings for this (except the protein) in the house.