Hearty Keto Lasagna

Ingredients

• 1 pound ground beef
• 1 pound Italian sausage
• 1 tablespoon olive oil
• 1 medium onion, chopped
• 3 cloves garlic, minced
• 2 cups marinara sauce (sugar-free)
• 1/2 cup heavy cream
• 2 cups ricotta cheese
• 2 cups shredded mozzarella cheese
• 1/2 cup grated Parmesan cheese
• 2 large eggs
• 1 tablespoon dried basil
• 1 tablespoon dried oregano
• 1/4 teaspoon salt
• 1/4 teaspoon black pepper
• 2 tablespoons chopped fresh parsley
• 4 medium zucchini, sliced lengthwise into thin strips
• 1 tablespoon butter