Marinated Portobello Stuffed Whole Chicken with Roasted Sweet Potatoes and Red Onion

Name: Marinated Portobello Stuffed Whole Chicken with Roasted Sweet Potatoes and Red Onion
Ingredients: 1 (3-pound) whole fryer chicken; 8 slices Marinated Portobello mushrooms (4 whole portobellos), recipe follows; Kosher salt and freshly ground black pepper, to taste; Dash smoked paprika; 2 large sweet potatoes, peeled and quartered; 1 medium red onion, cut into 8 wedges (from root to tip); Olive oil, for drizzling; 8 portobello mushroom caps; 1 cup extra-virgin olive oil; 4 cloves garlic, minced; 1 large shallot, minced; Zest and juice of 2 lemons; 1 tablespoon chopped fresh oregano; 1/2 tablespoon chopped fresh thyme; 1 teaspoon honey; 2 teaspoons kosher salt; 2 teaspoons freshly ground black pepper