Cantonese Beef and Pineapple

1 tablespoon soy sauce
1/2 teaspoon cornstarch
1 pound boneless beef top sirloin, cubed
2 tablespoons water
2 green or red bell peppers, cubed
1 clove garlic
1 tablespoon vegetable oil, or more if needed
1 (8 ounce) can pineapple chunks, drained
Cooked rice

In a medium bowl, combine soy sauce and cornstarch. Add beef and toss to coat.

In a nonstick skillet over medium-high heat, add water, peppers and garlic. Cook and stir 3-4 minutes until peppers are crisp-tender. Remove from skillet.

In same skillet, heat oil until hot. Add half of beef and cook 2-3 minutes. Remove and add remaining beef and cook for 2-3 minutes, adding more oil if needed.

Return all beef to skillet and add sauce mixture, peppers, and pineapples. Heat through.

Serve with rice.