Heat a medium pan over medium-low heat and add 1 Tbsp. of butter. When melted, add minced shiitakes and cook 10-12 minutes, stirring occasionally. When lightly browned, add shallot and cook until softened, about 5 minutes. Add soy sauce, 2 Tbsp. of maple syrup and ¼ cup of water. Stir to combine and raise heat to simmer. Continue cooking until mixture is thickened and has a jam-like consistency. Remove from heat, stir in half the chives, and remove mixture to a bowl. Cover and set aside, keeping warm.