Place stew meat in slow cooker, sprinkle with curry powder, add all other ingredients and stir to combine. Cover, cook on low 7 to 8 hours. Beef Curry is delicious served over a bed of brown rice, quinoa or couscous. Recommend 4- 6 quart slow cooker. For a thicker curry, combine cornstarch and water, add to slow cooker the last 15 minutes of cooking time.
NOTE: If preferred, saute onion in 1 tablespoon olive oil until tender, about 4 minutes. Add garlic and saute one additional minute. Add to slow cooker along with other ingredients.