Final answer:
John can create numerous salad combinations by pairing a type of lettuce with one vegetable, such as romaine with cucumber or Bibb with peas.
Step-by-step explanation:
The question asks about possible outcomes for combining one type of lettuce with one other type of vegetable to make a salad. Based on the provided information, some of the possible vegetable options include cucumber, peas, various forms of potato, radishes, spinach, squash, sweet red pepper, and tomato. Combining any one of these vegetables with a type of lettuce such as romaine or Bibb would result in a distinct salad combination.
For example, John could combine organic romaine lettuce with a small cucumber, or he might choose Bibb lettuce and add a side of cooked peas. With these ingredients, the possible outcomes are numerous and can be selected based on personal preference or availability of the vegetables.