The Secret Ingredient: Crème Fraîche

1 pound frozen spring peas

1/2 large shallot, minced

2 teaspoons unsalted butter

1/4 cup creme fraiche

1 tablespoon chiffonade of fresh mint leaves, plus more for garnish

Macaroni and cheese:

1 pound mostaccioli or ziti

1/2 cup grated fontina

1 cup creme fraiche

1/2 cup grated zucchini (1/2 zucchini)

1/2 cup grated Gruyere

1/2 cup grated sharp white cheddar

1/2 grated Parmesan

1 teaspoon fresh thyme leaves, plus more for garnish

Salt and pepper

Creme fraiche Sorbet:

2 cups creme fraiche

1/4 cup light corn syrup

1/2 cup sugar