Spinach and Artichoke Dip with Blue Cheese and Bacon

1 cup coarsely chopped sweet onion,

1 large 2 cans artichoke hearts, drained and coarsely chopped,

14 oz. each 1 box. frozen chopped spinach, thawed and well drained,

10 oz 1 cup chopped sweet red pepper

1 cup light mayonnaise

1 pkg. cream cheese, cut up,

8 oz 4 oz. blue cheese, crumbled

3 cloves garlic, minced

1/2 tsp. dry mustard Assorted crackers or toasted pita bread wedges