Portobello Mushroom Pave with White Asparagus Vinaigrette

Name: Portobello Mushroom Pave with White Asparagus Vinaigrette
Ingredients: 6 large portobello mushrooms, stems and gills removed, gill trimmings reserved; 2 3/4 cups water, at room temperature; 1/2 cup organic soy sauce; 1/4 cup minced ginger; 1 tablespoon minced garlic; 1 jalapeño, minced; 3 tablespoons chopped cilantro; 1/4 cup plus 2 tablespoons minced shallot; 1/4 cup fresh lemon juice; 3 stalks pencil-thin white asparagus, trimmed; 1 tablespoon chopped mint; 1/2 teaspoon ground coriander; 2 tablespoons rice vinegar; 5 tablespoons raw tahini; 3 teaspoons white sesame seeds; 1/4 cup grapeseed oil; Sea salt; Freshly ground pepper