Easy Roasted Rustic Potatoes

Ingredients

• 1 medium red onion, cut into wedges
• 1 lb. small red potatoes, cut in half
• 1 c. cherry or grape tomatoes
• 1 T. fresh rosemary leaves, finely chopped
• 1/2 t. garlic powder
• Sea salt
• black pepper
• 2 T. Extra virgin olive oil
• 1/2 medium lemon, preferably organic, sliced and cut into half rounds
• 5-6 large garlic cloves, unpeeled
• additional lemon wedges, for garnish