2 Tbsp. olive oil
2 cups chopped mushrooms
1 cup seeded, chopped green bell pepper
1 cup finely chopped yellow onion
3 cups loosely packed, chopped spinach
1 lb. 2% cottage cheese
3 cups (divided) shredded mozzarella cheese
1/4 tsp. salt
26 oz. jarred low sodium pasta sauce
2 large (sliced, 1/4-inch thick rounds) zucchini
8 oz. no-boil whole wheat lasagna noodles