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1
In large skillet, cook pancetta until crisp, stirring occasionally. Remove with a slotted spoon; drain on paper towels. Discard drippings, reserving 1 tablespoon in pan.
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2
Add 1 tablespoon butter to drippings; heat over medium-high heat. Add onion; cook and stir 4-6 minutes or until tender. Transfer onion to a large bowl.
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3
Heat remaining butter in pan. Add mushrooms; cook and stir 2-3 minutes or until tender. Stir in spinach; cook 30-45 seconds or until wilted.
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4
Add bread cubes, mushroom mixture, pancetta and, if desired, almonds to onion; toss to combine. Transfer to a greased 13x9-in. baking dish.
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5
In a large bowl, beat eggs, cream, salt and pepper until blended. Beat in mascarpone cheese just until blended; pour over bread. Sprinkle with mozzarella cheese and Asiago cheese; spoon preserves over top. Refrigerate, covered, several hours or overnight.
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6
Preheat oven to 350u00b0. Remove strata from refrigerator while oven heats. Bake, uncovered, 35-45 minutes or until golden brown and a knife inserted in the center comes out clean. Sprinkle with basil. Let stand 5-10 minutes before cutting.