Western Beans'n' Franks

• 325 degree oven
• 2 orange (wedges)
• 1 frankfurters
• 1/2 reserved bean liquid
• 250 gr idaho great northern beans
• 230 gr idaho pinto beans
• 80 ml molasses
• 60 gr onion (chopped)
• 55 gr brown sugar
• 7 ml dry mustard