Creating a Surface from a Curve
I wish to, in the following image, create a surface between the inner shape in green, and the outer circle:
When I use, 'Surfaces from Edges' though, it just makes a surface from the whole circle:
Which is not what I want. It's supposed to be empty within the inner shape. Which makes me think perhaps I need to use, 'Surfaces from Sketches', but I can't turn the inner shape into a sketch. Any help would be appreciated, thank you.