Thinly slice peppers and mash avocado; set aside separately.

Brush the outside of each slice of bread with olive oil, then spread avocado on the inside of each slice.

Add sliced peppers, cheese, spinach and turkey to half the bread, then top with remaining slices to make sandwiches, keeping the oiled side out.

Heat a panini press or skillet. Cook each sandwich until golden brown, then slice in half.

Serve sandwiches with oranges on the side.