Sauté ¼ cup chopped onion, 2 cloves minced garlic, 1 tsp. minced ginger in 1 tsp. olive oil until tender. Add one tbsp. curry powder, 2 tbsp. tomato paste, 1 tsp. corn starch. Stir until blended. Add one cup of fish or vegetable stock, one tbsp. fresh lime juice, 1 tsp. sugar, 1 tbsp. soy sauce. Stir until blended. Season with salt and fresh pepper, simmer, and cook for five minutes. Set pan aside and cover.