Dinner Tonight: Curried Udon Noodle Stir-Fry

4 tablespoons canola oil

2 tablespoons all-purpose flour

1 1/2 teaspoons curry powder

1/2 teaspoon garam masala

3/4 cup vegetable broth

2 teaspoons sugar

1 large yellow onion, sliced thinly

1 teaspoon fresh ginger, grated

1 red bell pepper, seeded, and thinly sliced

1 hot red chile, stemmed, seeded, and thinly sliced

1/2 pound broccoli florets, chopped

3 tablespoons soy sauce