Step 1Heat the oven to 350 degrees. Butter 6 (5-inch-by-1-inch) gratin dishes. Divide the sun-dried tomatoes and saucisson slivers among them. Arrange the cherry tomatoes in the dishes.
Step 2In a blender jar, combine the milk, eggs, melted butter, salt, pepper, rosemary and flour and process until smooth. Divide the mixture among the prepared pans, pouring about one-third cup in each dish and half-covering the tomatoes.
Step 3Bake until set, about 20 minutes. Serve warm.