In a large kettle on medium-high heat, place all the ingredients except for the flour, ½ cup water, and canola oil.

Simmer for approximately 25 to 30 minutes or until vegetables are tender.

Mix the flour, cold water, and canola oil together in a separate container until smooth and creamy.

Stir the flour mixture into the stew and bring it to a boil. Remove from heat. Garnish with some fresh green onions.