Bok Choy and Mushroom Stir-Fry

Ingredients:

2 Tablespoons canola oil
1 cup thinly sliced onions
1/2 cup chopped red bell pepper
4 cloves minced garlic
1/2 Tablespoon grated ginger
1 pound coarsely chopped bok choy
1/2 pound sliced mushrooms
2 Tablespoons fresh lemon juice
1 Tablespoon soy sauce
1 teaspoon granulated sugar

Directions:
Heat the oil in a large heavy skillet over medium-high heat. Add the onions, pepper, garlic, and ginger. Stir-fry for about 1 minute. Add the bok choy and mushrooms; stir-fry for about 1 minute. Add the lemon juice, soy sauce, and sugar. Stir-fry for about 2 to 3 minutes, until done.