A potato ricer gives the torta the most desirable texture; they're inexpensive (as little as $10) and produce the creamiest mashed potatoes.
How to Make It
Preheat oven to 375°.
Place potatoes and 1 tablespoon salt in a large saucepan; cover with water. Bring to a boil. Reduce heat; simmer 15 minutes or until tender. Drain; cool slightly. Peel potatoes; discard peels. Press cooked potatoes through a ricer into a large bowl.
Heat oil in a large nonstick skillet over medium heat. Add garlic; cook 2 minutes, stirring frequently. Stir in romaine, spinach, and arugula; cook 1 minute or until greens wilt, tossing frequently. Remove greens from pan; finely chop.
Add greens, milk, fontina, eggs, and remaining 1/2 teaspoon salt to potatoes; stir well to combine. Coat a 9-inch pie plate with cooking spray; dust with breadcrumbs. Add potato mixture to prepared dish. Bake at 375° for 25 minutes. Remove from oven; sprinkle with pecorino. Let stand 10 minutes before serving.
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