Chicken Curry with Squash

Name: Chicken Curry with Squash
Ingredients: 1/4 cup canola oil; 1 large onion, finely chopped; 2 large garlic cloves, minced; 2 tablespoons minced fresh ginger; 2 hot chiles with seeds, minced; 2 tablespoons Madras curry powder; 1 1/2 teaspoons turmeric; 5 cups low-sodium chicken broth; 1/2 cup coconut milk; Salt and freshly ground pepper; 2 pounds Yukon Gold potatoes, peeled and cut into 1 1/2-inch pieces; 1 pound cauliflower, cut into florets; 2 yellow squash, cut into 1-inch pieces; 1 1/2 pounds skinless, boneless chicken breasts, cut into 1-inch pieces; Rice and lemon wedges, for serving