Combine the cheeses in a bowl. Brush the top side of each bread slice with the pecan oil. Flip four slices over and spread equal amounts of the cheese on each. Cover with the remaining bread slices (oiled side up) and press gently but firmly to lightly compact the cheese. Heat a large non-stick skillet over medium-low heat for 1 minute. Place 2 sandwiches in the pan and press lightly with a large metal spatula. Cook until the bread is golden brown, about 3 minutes. Flip the sandwiches and press again with a spatula. Cook for 2 to 3 minutes longer. Repeat with the remaining sandwiches. Serve warm. Makes 4 servings