keto homemade low carb lasagna

Ingredients:

For the “noodles”:

2 medium zucchinis, sliced lengthwise into thin strips
Salt
For the meat sauce:

1 lb ground beef
1/2 onion, diced
2 cloves garlic, minced
1 can crushed tomatoes (28 oz)
1 tbsp tomato paste
1 tsp dried oregano
1 tsp dried basil
Salt and pepper, to taste
For the cheese mixture:

2 cups ricotta cheese
1/4 cup grated Parmesan cheese
1 egg
1/4 tsp salt
1/4 tsp black pepper