Adding "amount" to a multi-select lookup field

Adding "amount" to a multi-select lookup field

Hi, I have two forms.  The second form(recipes) has a multi-select lookup field to the first (components).  The problem I'm running into is that each recipe could include multiple of the same component.  Is this possible and how can I accomplish this?  Basically, I need to add an "amount" field to each of the chosen components in the multi-select lookup field.