Grilled Onions and Mushrooms with Limed Sour Cream (Aida Mollenkamp) Recipe - Details, Calories, Nut

Ingredients

• 1 cup plain sour cream
• 1 tbsp freshly squeezed lime juice
• 1 tsp lime zest
• 1/2 tsp kosher salt, plus more for seasoning
• 1/2 tsp freshly ground black pepper, plus more for seasoning
• 1 medium red onion, cut into 8 wedges
• 3 large portobello mushrooms , cut into 1-inch slices
• vegetable oil , for brushing the vegetables