peruvian roasted chicken with sweet onions

Ingredients

• 1/2 teaspoon canola oil, plus more
• 1 1/2 tablespoons sweet paprika
• 1 tablespoon ground cumin
• 1 1/2 teaspoons fine sea salt
• 1 1/4 teaspoons ground black pepper
• 5 - cloves garlic, finely chopped
• 2 1/2 tablespoons white wine vinegar
• 2 - large sweet onions, peeled and thickly sliced
• 1 - chicken, cut into 10 serving pieces
• 2 - red or yellow bell peppers, cored, seeded and cut into chunks
• 1 - lemon, sliced