Pulse in a food processor until very finely chopped. Combine milk, flour, salt, pepper and nutmeg in a large saucepan. Cook over medium heat, whisking, until thickened, 2 to 4 minutes. Remove from the heat and stir in half a cup of cheddar, cottage cheese and the spinach.
An aspheric lens or asphere is a lens whose surface profiles are not portions of a sphere or cylinder. In photography, a lens assembly that includes an aspheric element is often called an aspherical lens. The asphere's more complex surface profile can reduce or eliminate spherical aberration and also reduce other optical aberrations such as astigmatism, compared to a simple lens.
For a thin lens in air, the focal length is the distance from the center of the lens to the principal foci (or focal points) of the lens. For a converging lens (for example a convex lens), the focal length is positive, and is the distance at which a beam of collimated light will be focused to a single spot.