In a bowl, mix the feta, ricotta, and sour cream together. Then, using a mixer or immersion blender, purée on the mix on high speed for about 2–3 minutes until creamy. Season with salt and pepper to taste.
Peel and finely chop the garlic. Heat some olive oil in a pan over low heat and sauté the garlic until soft and aromatic, but not browned.
Remove the pan from the heat and stir in honey, lemon juice, and chili flakes. Season with salt and pepper.
Transfer the feta cream to a bowl and drizzle generously with the hot honey. Sprinkle with za'atar and sesame seeds.