Baked Ziti with Turkey Sausage

pound(s) uncooked turkey sausage(s) spicy-variety, casings removed

medium uncooked onion(s) chopped

medium green pepper(s) chopped

canned diced tomatoes

frozen green peas thawed

canned tomato paste

dried oregano

dried basil

dried thyme

fennel seed

table salt or to taste

black pepper freshly ground

uncooked whole wheat pasta ziti, cooked according to package directions

shredded part-skim mozzarella cheese