Is there a way to accelerate or pre-cast spells with long casting times?

Some spells have casting times of 1m (Tsunami, Conjure Elementals, etc). I am a low level caster with no access to Wish. Is there a way to prepare the spell,somehow pre-cast it the day before into an item, to be able to use it in combat in a single turn?

If I’m in a defensive position, I can combine it with Glyph of Warding. But the Glyph can’t move too far, so it won’t work if I’m storming the enemy castle and I need my trusty elementals. Spell scrolls and Rings of Spell Storing also maintain the spell’s casting time, as far as I know. Sorcerers can only quicken 1 action to 1 bonus action.

What other options are there?