Best Vegetarian Moussaka Recipe - How To Make Vegetarian Moussaka

Ingredients

• 2 medium eggplants, sliced into 1/2" rounds
• Kosher salt
• 4 tbsp. extra-virgin olive oil, divided
• 1 medium yellow onion, chopped
• 8-oz. baby bellas, sliced
• 3 cloves garlic, minced
• 1 c. green lentils
• 1 (14.5-oz.) can diced tomatoes
• 2 c. water
• 1 tsp. dried oregano
• Freshly ground black pepper
• 2 tbsp. butter
• 2 tbsp. all-purpose flour
• 2 c. milk
• 3/4 c. freshly grated Parmesan, divided
• 2 large egg yolks