As preferred, can be all cooked together or saute garlic gently, add onion till partially caramelized, add all other ingredients (salt at end to taste). Simmer 20 to 30 min after all ingredients are added. Remove and discard bay leaf.
Brown beef (I usually cut slices from round, brown in oil) prepare as for breaded cutlets...flour, egg wash, seasoned bread crumbs...slice to about 1/4 inch.
In baking dish layer tomato sauce. Top layer with beef cutlets, continue layers of beef cutlets and tomato sauce. Finish with mozzarella cheese and or both, parmesan cheese.
Bake in moderate oven (350°F), covered baking dish, till tender (usually 1 to 1 1/2 hours). Cool, eat, enjoy!