I made these last weekend, when we were invited over at the last minute to have dinner in our friends’ back yard. I wanted to make a pie, but there wasn’t time – and my crammed freezer had half a package of frozen tart shells left over from something or other that I kept having to move so I could close it, so I decided to solve two problems at once. Most berries are sweetened and thickened with sugar and flour or cornstarch before being baked in a pie; in this case, the tart shells get a…
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