Pick the substitute best suited for your dish's cooking method and flavor preference.
Prepare the greens by washing and trimming; peel and slice broccoli stems for the DIY blend if used.
Apply the recommended ratio: usually 1:1 fresh weight except for the DIY blend which is 2:1 broccoli stems to spinach.
Adjust cooking time as substitutions have thinner stems or require blanching; reduce cooking by 1-2 minutes for broccolini or blanch rapini if needed.
Check for desired bitterness and texture, balancing sharp flavors with seasoning or sugar as necessary.