Chilling the grits helps them hold their shape and makes them firm enough to cut when grilled.
Combine first 7 ingredients in a large bowl; stir well. Pour the grits into a 10-inch square baking dish coated with cooking spray, spreading evenly. Cover and chill 1 hour or until completely cool.
Invert grits onto a cutting board; cut into 4 squares. Cut each square diagonally into 2 triangles.
Place grits triangles on grill rack coated with cooking spray; grill 5 minutes on each side or until lightly browned and thoroughly heated.
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