Cut the top fifth off tomatoes and scoop out flesh. Discard or save for another use.Advertisement
In a microwave-safe bowl, heat wild rice for 2 minutes. Stir in Canadian bacon and cook 1 more minute. Stir in walnuts, mayonnaise, yogurt, parsley, pepper and 1/4 tsp of the salt. Scoop rice mixture evenly into tomatoes; replace the tops.
Toss romaine with oil, vinegar and a pinch of salt. Serve tomatoes alongside salad and bread.