Slice baguette into 1/4 inch thick slices and lay slices out on a cookie sheet. Combine cheese, mayonnaise, and Italian seasoning in a bowl. If you are adding other ingredients (i.e., green onion), you would add it here. The consistency should be that of a thick paste. Feel free to add more cheese or mayo to get the right consistency. Spread the cheese mixture on the baguette. Place in the oven on broil. Broil until bubbly and starting to brown. Serve warm.