This is a simple steakhouse-style meal to make weeknights feel special
Heat a large cast-iron skillet or griddle pan over medium-high. Season the steaks with kosher salt and pepper.
In a kettle or small pot, bring a few cups of water to a boil.
In another large skillet, heat 2 tbsp. oil, two turns of the pan, and 1 tbsp. butter over medium-high. When the butter melts, add the shallots and garlic. Cook, stirring often, until softened, 2 to 3 minutes. Whisk in the flour, then the half-and-half. Reduce heat to low and keep the sauce warm. Line a strainer with a kitchen towel and fill with the spinach. Pour the boiling water over the spinach to wilt the leaves. Using the kitchen towel, wring out the excess liquid from the spinach. Add the spinach and artichokes to the sauce. Add the nutmeg, cheese, and lemon juice.
Add the remaining 1 tbsp. oil, one turn of the pan, to the cast-iron skillet. Add the steaks. Cook, turning occasionally, for about 8 minutes. Let rest for about 5 minutes. Slice the steaks against the grain.
Toast the bread and spread with the remaining 2 tbsp. butter. Cut the toasted bread from corner to corner.
Arrange 2 toast points on each plate and top with the sliced steak. Top the steak with the creamed spinach and artichokes.