Makes 4 sandwiches
2 teaspoons olive oil
1 teaspoon yellow mustard seeds
1 small yellow onion, finely diced
½ cup sugar
1/3 cup apple cider vinegar
1 teaspoon finely chopped peeled fresh ginger
¼ teaspoon dried red pepper flakes
4 firm but ripe peaches (about 1½ pounds), pitted and cut into 1-inch chunks
½ teaspoon salt
8 slices whole wheat sourdough bread
8 ounces Point Reyes Toma, shredded
4 ounces Point Reyes Fresh Mozzarella, drained and pulled apart
3 tablespoons thinly sliced fresh basil
4 tablespoons butter, softened
To make the chutney: Heat oil in a large saucepan over medium heat. Add mustard seeds and sauté for about 30 seconds, until they begin to pop. Add onion and sauté until translucent, 3–4 minutes. Stir in sugar, vinegar, ginger, and pepper flakes. Cook until sugar dissolves, stirring occasionally. Add peaches and cook about 10 minutes, stirring occasionally, until fruit is tender and a thick syrup has formed. Stir in salt. Remove from heat.
To make sandwiches: Spread four slices of bread with a tablespoon each of chutney. Distribute Toma and mozzarella evenly over chutney. Finish with fresh basil. Press remaining bread slices firmly on top. Butter outside of the top and bottom slices of bread.
Heat a large non-stick skillet over medium-high heat. Add sandwiches and cook until the bottom slice of bread is golden brown. Flip sandwiches and cook until cheese is melted and bread is toasty. Serve hot.