1/2 pound asparagus
1 teaspoon olive oil
1 pinch salt
1 avocado
1/2 lemon
1/2 teaspoon chili flakes
1 pinch salt
8 slices German rye bread
2 tablespoons butter, softened
6 ounces dill Havarti, thinly sliced
Preheat the oven to 400 degrees Fahrenheit. Toss the asparagus with the oil and the salt, and lay out in one even layer on a baking sheet. Roast for 20 minutes or until cooked through and slightly caramelized. Cut into lengths as long as the slices of bread, then set aside.
Scoop the avocado into a bowl, then add the lemon juice, chili flakes, and salt. Use a fork to mash together, then set aside.
Butter both sides of the rye bread slices. Spread the avocado purée evenly over four of them, then add the asparagus, pressing them into the avocado slightly. Top with the Havarti, then close the sandwiches with more bread.
Heat a nonstick pan over medium heat. Cook the sandwiches, working in batches if needed, for four minutes per side. Halve and serve.