1In large bowl, mix potatoes, eggs, cheese, Bisquick mix and garlic salt.
2In 12-inch skillet, heat 2 tablespoons of the oil over medium heat. For each patty, spoon about 1/2 cup potato mixture into oil in skillet. Flatten with the back of spatula.
3Cook patties about 4 minutes, turning once, until golden brown. Remove from skillet and cover to keep warm while cooking remaining patties. Add remaining 2 tablespoons oil as needed to prevent sticking.
4In 2-quart saucepan, heat corn, beans and salsa over medium heat 2 to 3 minutes, stirring occasionally, until hot. Serve over patties. Top with sour cream.