Keto Breakfast Casserole With Mushroom, Kale, Onion — Eat This Not That

Ingredients

• 3 tbsp avocado oil or ghee
• 1 medium onion (11 oz)
• chopped (2 cups)
• Fine sea salt and freshly ground black pepper
• 10 oz cremini mushrooms
• thinly sliced (4 cups)
• 5 oz baby kale (about 4 cups)
• chopped
• 3 cloves garlic
• minced (1 tbsp)
• 2 ¼ oz gruyere
• shredded (¾ cup)
• 12 large eggs
• 1/2 cup heavy cream
• 2 tsp fresh thyme leaves
• 1 tbsp chopped fresh flat-leaf parsley