Combine half of the onion, the vinegar and a pinch of salt in a medium microwave-safe bowl. Microwave until hot; set aside.
Heat the olive oil in a large skillet over medium-high heat. Add the remaining onion and cook, stirring, 3 minutes. Add the artichokes and heat through, 4 minutes. Stir in half of the spinach and cook until wilted, 2 more minutes. Remove from the heat and stir in the asiago, goat cheese, mayonnaise and the remaining spinach.
Heat a grill pan over medium heat. Sandwich the spinach-artichoke mixture between the bread slices. Brush the sandwiches with olive oil and add to the grill pan. Grill 3 minutes per side. Let rest 2 minutes; cut in half.
Drain the reserved onion. Drizzle with olive oil, then add the tomatoes, parsley, and salt and pepper to taste; toss. Serve with the sandwiches.
Tools You May Need
Photograph by Antonis Achilleos
Courtesy of Food Network Magazine
Tools You May Need
Price and stock may change after publish date, and we may make money off
these links.