Slow Cooker Pepper Steak

• 2 lbs. beef strips Look for beef cut into strips already or buy top sirloin and cut into 1/2 inch
• strips (round steak works well too).
• 1 green bell pepper sliced thick
• 1 red bell pepper sliced thick
• 1 white onion sliced

For the sauce:
½ cup water
2 beef bouillon cubes
3 Tbsp. soy sauce
1 tsp. Worcestershire sauce
¼ tsp. ground ginger
¼ tsp. garlic powder
½ tsp. black pepper
2 tsp. brown sugar honey or white sugar work too
1 Tbsp. cornstarch
¼ tsp. red pepper flakes (optional)