I recently discovered a storebought marinara sauce that's quite tasty. Though the thought had never dawned before, I feel compelled to mix it with

p.s. NancyD, I meant to add: if you try the Bon Appetit recipe, you would of course skip the canned plummed and use your marinara sauce instead. I would skip the teaspoons of sugar the recipe calls for, since jarred marinara generally has sugar already. (You could always add a pinch of sugar at the end if you think it's too tart.) Depending on how spicy your marinara is, you might want to skip the teaspoon of crushed red pepper flakes. I bet it will be very tasty!

Spaghetti with strawberry tomato sauce, from Bon Appetit.com
http://www.bonappetit.com/recipe/spaghetti-with-strawberry-tomato-sauce

I don't know of any tradition, but I have seen the combination of tomatoes and strawberries. Here, for example, is a bruschetta recipe
https://food52.com/recipes/23349-not-too-sweet-tomato-strawberry-bruschetta