Tomato & Pancetta Brunch Tart Gelson's

Ingredients

• 1 disc all-butter pie crust
• 1 small yellow onion, thinly sliced
• 2 cups multicolored cherry tomatoes, halved
• 4 oz cremini mushrooms, quartered
• 3 oz pancetta, diced
• 1 tsp fresh thyme leaves, chopped
• 2 Tbsp extra-virgin olive oil
• 1 pinch plus ¼ tsp kosher salt, divided
• 2 pinches freshly ground black pepper, divided
• 2 large Gelson’s eggs
• 1 cup heavy cream
• ¼ cup crumbled feta
• ¼ cup whole milk ricotta