01 -
Thinly slice the English cucumber. Peel the carrots, then grate on the large holes of a box grater (about 2 cups). Thinly slice the tomatoes with a serrated knife.
02 -
Halve and pit the avocados. Scoop the flesh into a medium bowl. Add lemon juice, olive oil, and kosher salt, and mash until the avocado is smooth.
03 -
Toast the multigrain bread slices. Place 4 of the slices on a work surface and spread 2 tablespoons hummus on each. Top each with 2 slices provolone cheese. Divide the sprouts over the cheese. Divide the tomatoes, cucumbers, and carrots over the sprouts.
04 -
Spread the mashed avocado onto the remaining 4 bread slices (about 3 tablespoons each). Place avocado-side down over the carrots to close the sandwiches. Cut each sandwich in half with a serrated knife and serve immediately for best taste and texture.