Zucchini Lasagna

Ingredients (13)

• 1 lb 93% lean ground beef
• 1 1/2 teaspoons kosher salt
• 1 tsp olive oil
• 1/2 large onion chopped
• 3 cloves garlic minced
• 1 28 oz can crushed tomatoes
• 2 tbsp chopped fresh basil
• black pepper to taste
• 3 medium 8 ounces each zucchini, sliced 1/8" thick
• 1 1/2 cups part-skim ricotta
• 1/4 cup Parmigiano Reggiano
• 1 large egg
• 16 oz 4 cups shredded part-skim mozzarella cheese