Slow Cooker Lasagna

INGREDIENTS

• 1 pound lean ground beef
• 1 onion, chopped
• 2 teaspoons minced garlic
• 1 (29 ounce) can tomato sauce
• 1 (6 ounce) can tomato paste
• 1 1/2 teaspoons salt
• 1 teaspoon dried oregano
• 1 (12 ounce) package lasagna noodles
• 12 ounces cottage cheese
• 1/2 cup grated Parmesan cheese
• 16 ounces shredded mozzarella cheese