WHAT’S COOKING: Asparagus spears with rosemary-infused Parmesan butter cream

I find it hard to believe now that when I started cooking seriously all those years ago, I found the idea of blanching asparagus daunting. Yet it’s so easy, if you obey the simple yet clear rules: cook gently, for less time rather than more, while avoiding violent boiling.Before this, there’s the easy trick of snapping off the hard, stalky ends of the spears, and remembering to peel away the little scales. The rest (after blanching and refreshing) only involves whatever sauce you might be serving them with, though you can of course just plate them up with a sprinkling of grated Parmesan and a grinding of black pepper.That’s how I often do them but this time I decided to infuse butter and cream with a sprig of rosemary and grate Parmigiano-Reggiano into it.Asparagus is a spring vegetable and they’re fairly abundant right now.(Serves 2)Ingredients4 or 5 asparagus spears per portion1 rosemary sprig3 Tbsp butter2 Tbsp finely grated Parmigiano-Reggiano3 Tbsp creamBlack pepperNo salt (the cheese is salty enough)MethodSnap off the ends of the spears (they will snap at the right point) and discard the end parts. Scrape off the little triangular scales (which are actually leaves). Bring water to the boil in a pot, turn down to a simmer, and plunge the spears in.They need to simmer for barely minutes, nice and low, then slide them into a colander over the sink and immediately run cold water through them, over your hand. By this I mean placing your hand between the running water and the asparagus to disperse the water so that it runs over them gently. If hard running water hits the spears it risks disintegrating them, especially if you have overcooked them; another reason not to do that.Melt the butter gently with the rosemary sprig and cream and let it stand for 5 minutes for the rosemary to infuse. Remove the sprig. Grate the Parmesan into the rosemary butter.Arrange the spears on plates. Spoon the rosemary Parmesan cream over the spears and grate Parmigiano-Reggiano or other Parmesan style cheese over as well as freshly ground black pepper. DMFollow Tony Jackman on Instagram @tony_jackman_cooks.