Cook lasagna noodles according to the directions on the package, drain, rinse with cold water; set aside.
Preheat oven to 375 degrees F.
Heat large nonstick skillet over medium-high heat and add olive oil. Add onion, pepper, zucchini, and ground beef. Brown until ground beef is done.
Stir in marinara sauce, bring to a boil. Reduce heat, simmer uncovered until sauce is slightly thickened approx 10 minutes.
Spread ¼ of sauce in 13 x 9 inch baking dish. Place three noodles on top of the sauce. Spread ½ cup of ricotta cheese on top of noodles. Repeat two more times. Add one more layer of sauce on top.
Cover (tin foil works well) and bake for 30 minutes.
Remove cover, top with Pecorino Romano cheese and shredded mozzarella cheese
Bake until heated through and cheeses are lightly browned, about 20 minutes longer.
Continue to bake for approx 20 minutes, or until cheese is melted and lightly browned, and lasagna is heated all the way through.
Let stand 10 minutes. Serve.
Notes
10 Points®MyWW Points: 8 Blue Plan and 10 Green PlanWe are not associated with Weight Watchers/WW in any way. Double check points on their official calculator.