Before you start: Prepare: 20 minutes Sauté and heat broth: 15 minutes Simmer potatoes: 30 minutes Finish peas and cream: 5 minutes Use the listed ingredient state: dry, cooked, thawed, drained or squeezed. Times are estimates; follow the doneness cues.
Recipe note: Refrigerate perishable leftovers promptly in shallow containers; use within 3–4 days and reheat to 165°F. Count storage from the original cooking date when using leftovers. Refrigerate perishable cooked dishes in shallow containers within 2 hours, or 1 hour above 90°F; keep the refrigerator at 40°F or below.
Leave enough potato texture
Cut the potatoes into the stated three-quarter-inch pieces so one large chunk does not delay the rest. Before blending, check a piece with a fork and remove the thyme stems. Take the pot off the heat and keep the immersion-blender head submerged; a short blend is enough when the goal is a soup with some recognizable pieces.
Blending more does not solve an undercooked chunk. Let the potatoes become tender first, then decide how much texture to keep.
Finish gently with cream and peas
Add the cream and frozen peas over low heat as directed, then let them become hot without driving the soup into a vigorous boil. Stir along the base so the thickened soup does not catch while you prepare the bowls.
Keep the lemon juice and chives for the off-heat finish. Taste the completed soup before deciding it needs an adjustment: broth, salt, cream and lemon work together. A planned leftover bowl may thicken in storage, so reheat it carefully and adjust that portion rather than adding extra liquid to the untouched first batch.
Timing and servings are estimates. Equipment, ingredients and portion sizes affect the result.