Easy keto lasagna in 30 minutes from the scratch

Name: Easy keto lasagna in 30 minutes from the scratch
Prep time: 15 min
Cook time: 15 min
Total time: 30 min
Cuisine: Italian
Ingredients: Ingredients instead of noodles; Edam cheese 200 g/7.05 oz (10 thin slices); Butter 1 TBS to grease the dish; Ingredients for Bolognese sauce; Olive oil 1 TBS; Ground/minced beef 450 g; 1 M Onion 70 g/2.5 oz; Garlic powder or spring garlic 1/4 tsp; Sugar free tomato sauce 200 g/7.05 oz (2/3 cup); Sea salt 1 tsp; Freshly ground pepper; Oregano 1 tsp; Dry basil 1 tsp; Ingredients for ricotta filling; Ricotta cheese 250 g/8.82 oz; 2 L eggs; Pinch of salt; Pinch of pepper; Ingredients for the cheese topping; Mozzarella cheese 200 g/7.05 oz; Parmigiano-Reggiano or Grana Padano cheese 20 g/0.70 oz