Heat olive oil gently in a saucepan. Sauté the red onion slices on medium heat for a few minutes. Once sautéed, turn down heat and add the honey, and when dissolved, add the walnuts. Cook until golden. Add the lime juice followed by the cheese and allow to melt (1-2 minutes).
In another pan, heat olive oil on medium heat and add the bread pieces. Cook until golden on all sides. Season with salt.
Slice the pear.
Toss the salad mix, bread pieces and pear slices and pour the sauce with the nuts and Castello Aged Havarti Cheese over it. Add additional cubed Havarti over top. Serve immediately.