Tomato-Cheddar Pie

Pulse salt, sugar, and 1 1/4 cups flour in a food processor until well combined. Add butter and pulse until mixture resembles coarse meal with a few pea-size pieces of butter remaining, about 10 seconds. With the motor running, add 1/4 cup ice water and process until dough just holds together, about 30 seconds. Squeeze a small amount of dough between your fingers; if it's very crumbly, add more ice water, 1 Tbsp. at a time (2 Tbsp. maximum). Do not over-process. Turn dough out onto a lightly floured surface and push together to form a rough ball. Knead a few times to combine, then roll into a ball. Flatten ball into a disc with smooth edges (no cracks), cover with plastic wrap, and chill at least 1 hour or up to overnight.