Preheat oven to 350. Slice the crusts off the bread and flatten with a rolling pin. Spray both sides of bread with cooking spray. Cut the bread in triangles. Cook the sausage, crumble it as it cooks. Drain and let cool. In a large bowl, mix the onion, jalapeno, cheese and sausage together. Scoop about a tablespoon of mix into each bread triangle. Fold bread around mix. Cook for about 10-15 minutes on a cookie sheet. The bread will brown and look crunchy when it is done.