@Misty928 I will tell you all I know about my favorite food that I have made for more than 50 years without a recipe.
I like big green peppers best (use any color). Cut the top off and chop it up to go in the filling. IF they won't stand up and you can slice off a little of the bottom lobes without making a whole, go for it. Otherwise cram in a small pot and the have to stand up--more or less--so some filling goes in the dish around the uncooperative vegetables.
Brown hamburger meat until browned but not crispy, add chopped onion (usually half a small to medium one--as you like), then the little pepper pieces, and saute a little to soften them up and spread the juices.
I would add pepper, garlic or garlic powder, and any seasoning you like (I use Italian blend) at this point. Then add in any cooked rice you want (usually for me about 1/2 a cup).
Add the tomato product: Sauce, or paste with a little water, or very well drained whole tomatoes chopped-take your pick but I use sauce. Just combine gently until the mixture is moistened and not too liquid. Add a little ketchup too if you like.
Pack into the pepper shells, put in a pan and bake until the peppers are done on the outside and soft (the outer skin might be a little shrivelled at this point) and the middle is hot. The filling will have been basically cooked when you fill them.
Top with ketchup before they are done so it can roast a little. Cook 350 degrees for about 30 minutes or until done.
Hints:
Sometimes I microwave the shells a little before I fill them if I am in a hurry.
I love mine really cooked until the outside pepper is very done.
If the peppers are sort of thick, I sometimes put a little water in the bottom of the dish (1/4 inch or so) just to steam a little.
IF the peppers are not very good shape (which is wide and shallow) I will cut the peppers vertically and line the dish with these big pices, then put the filling in and bake. Not as attractive but as good!
You can spice them like Mexican rice, with Cajun seasoning or Middle Eastern flavors. They are all good! I like just a little heat in them too sometimes!
I like the green peppers, hubby prefers the red!