Total Time
Prep 10 mins
Cook 6 mins

This grown up sandwich won Third Place in the Ready, Set, Cook Contest #16. This is a foodie sandwich with adult details like delicious pesto and a hot mayo. The two cheeses blend together into a nice oozy thick layer and with the sweetness of the onion and the pepper flavor of the arugula, you have a celebration in your mouth!

Ingredients Nutrition


  1. Spread softened butter on the outside of each bread slice.
  2. In a food processor, add basil, 1/4 C olive oil, 1 t salt, 1 T parmesan cheese; blend.
  3. In a small bowl, mix mayo, lemon juice and Sriracha chili. You may want to add more than 1 teaspoon. Depending on heat, add to desired taste.
  4. Heat a cast iron pan to medium heat or use a sandwich press. if using the pan, use 1 T olive oil and then put buttered side of sandwich down. The oil and butter make a tastier mixture.
  5. Put one buttered side of bread down; spread with pesto mixture; add 2 slices swiss and two slices fontina cheese, add onion slice and top with arugula.
  6. Spread other slice of bread with hot mayo. Put the mayo side inside.
  7. Cook approximately 2 minutes until browned on each side. Make sure cheese is melted and bread is nicely golden. Serve with more pesto for dipping, if desired.
Most Helpful

Maybe I'm not grown-up enough, but I thought there was waayyy to much cheese. The pesto was good, but my hot mayonnaise came out way to lemony. Not a favorite of my husband or I.

ElizabethKnicely January 23, 2013

Delicious sandwich! Truly comforting and such wonderful flavors! I have made this recipe twice already since I loved it so much.

Lainey6605 May 29, 2011

I really love this grilled cheese sandwhich! I enjoyed the pesto sauce and thought it was a nice addition to a typical recipe. The cheese oozed out of the sandwhich, and I found myself eating the bits of melted cheese, separate from the sandwhich. Weird, but yummy!

Studentchef May 29, 2011