Broil 2 large red bell peppers, turning, until charred, 15 minutes. Transfer to a bowl, cover and let steam 20 minutes. Remove the skin, stems and seeds. Puree the peppers in a blender with 1/4 cup each blanched almonds and lemon juice and 6 tablespoons olive oil; season with salt and pepper. Meanwhile, cook 2 russet potatoes (peeled and cut into chunks) and 6 smashed garlic cloves in salted simmering water until tender, about 12 minutes. Drain and return to the pot. Cook over medium heat, stirring, until dry, 2 minutes; remove from the heat and mash. Fold in the pepper puree. Drizzle with olive oil and lemon juice and top with chives.