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I have a love-hate relationship with Rachael Ray: yummy food, diet failure.
1/4 cup 2% greek-style yogurt
2 tablespoons mayonnaise
2 tablespoons prepared horseradish, drained
1 clove garlic, finely chopped
EVOO, for brushing
2 onions, cut into 1/8-inch-thick slices, rings left intact
Salt and pepper
1 1/2 lbs. filet mignon, cut crosswise into 4 even pieces (we used beef tenderloin)
4 plain pitas
1 bunch spinach - stemmed, thoroughly washed and dried
Pre-heat grill to medium. In a small bowl, mix together the yogurt, mayonnaise, horseradish and garlic. Lightly brush EVOO on the onions. Place them, rights intact, on the grill (if you have a grill topper, use it here). Season with salt and pepper, cover the grill and cook, carefully turning once, until softened and lightly charred, about 5 minutes; transfer to a bowl.
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Pat the beef dry and brush with EVOO; season with salt and pepper. Grill for 2 to 3 minutes per side for medium-rare. Transfer to a cutting board and let rest for 5 minutes before thinly slicing crosswise.
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Grill the pitas, turning once, until just warmed through but not crisp, about 1 minute. Spread horseradish sauce on the pita, then stuff with spinach, sliced meat and grilled onions. Finish with a dollop of hte remaining sauce and serve immediately. Serves 4.