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1
Mix yogurt, cucumber, the minced garlic clove, 2 teaspoons of the oil, lemon juice, and a generous sprinkling of salt and pepper; refrigerate until ready to use.
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2
Heat a large non-stick skillet over medium-low heat; add garlic cloves and toast until spotty brown, 5 to 7 minutes. Remove cloves from skillet and then smash and mince.
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3
Meanwhile, secure the KitchenAid(R) Food Grinder Attachment with the fine grinding plate into a KitchenAid(R) Stand Mixer attachment hub. Set mixing bowl under the grinder.
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4
With mixer set at speed 4, feed turkey chunks into hopper and, using the food pusher to help it through the chute and into the grinding chamber, grind the turkey.
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5
Stir garlic, feta, 1/2 teaspoon salt and a several grounds of pepper with a fork until well incorporated.
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6
Divide meat into 12 portions and form into 2 1/2-inch patties, brushing both sides lightly with a little oil.
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7
Return non-stick skillet to medium-high heat. When pan is very hot, add patties and cook, turning only once, until well browned on both sides and just cooked through, about 8 minutes total.
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8
Assemble sliders by spreading a little of the yogurt mixture on each bun bottom. Place few slices of onion and a few arugula leaves on bottom bun half and top with burger and a tomato slice, and a dollop of the yogurt mixture.
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9
Cap each burger with top bun half and serve.
