Melt butter in skillet. Add shallots, garlic, and jalapeno and saute until tender. Add spinach and toss until water is released. Add cilantro. Set aside.
Meanwhile, make toast and eggs.
Place half of the mashed avocado on each piece of toast. Spread avocado evenly right to the edges of the toast. Divide the spinach mixture and tomatoes between the two slices of toast and then top off with one egg per slice of toast.